AK4953A Datasheet, PDF (78/96 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/HP/SPK-AMP

[AK4953A]
SYSTEM DESIGN
Figure 50 shows the system connection diagram. An evaluation board (AKD4953A) is available for fast evaluation as
well as suggestions for peripheral circuitry.
Analog Ground Digital Ground
Power Supply 10u
0.9 ∼ 5.5V
Power Supply ^10u
1.6 ∼ 2.0V
Headphone
100 0.22u
100 0.22u
2.2u 2.2u
Speaker
Power Supply
DVDD ∼ 3.5V
Power Supply 10u
2.85 ∼ 3.5V
Line In
External MIC
Internal MIC
0.1u
28 ^AVDD
29 ^VSS1
2.2u ^2.2u
C
C
C
C
30 ^REGFIL
31 ^VCOM
32 ^LIN3
33 ^RIN3
34 ^LIN2
35 ^RIN2
36 ^MPWR2
MPWR1
AK4953A
Top View
VSS4 18
SVDD ₁₇
I2C ₁₆
MCKO ₁₅
MCKI ₁₄
VSS2 ₁₃
TVDD ₁₂
SDTO ₁₁
BICK ₁₀
0.1u
0.1u
C
C
DSP
μP
Notes:
- VSS1, VSS2, VSS3 and VSS4 of the AK4953A must be distributed separately from the ground of external
controllers.
- All digital input pins must not be left floating.
- When the AK4953A is used in master mode, LRCK and BICK pins are floating before M/S bit is changed to
“1”. Therefore, around 100kΩ pull-up resistor must be connected to LRCK and BICK pins of the AK4953A.
- 0.1μF capacitors at power supply pins should be ceramic capacitors. Other capacitors do not have specific
types.
Figure 50. System Connection Diagram (3-wire Serial Mode)
MS1252-E-00
- 78 -
2010/10